WIPER AND WASHER SYSTEM(w/ Rain Sensor) Rain Sensor Circuit

DTC Code DTC Name
Rain Sensor Circuit

DESCRIPTION

The windshield wiper relay assembly receives a signal from the rain sensor to control the auto wiper system.

WIRING DIAGRAM

E270595E01

CAUTION / NOTICE / HINT

Note:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - RAIN SENSOR)

    1. Disconnect the G85 windshield wiper relay assembly connector.

    2. Disconnect the Q5*1 or Q10*2 rain sensor connector.

      • *1: for LHD

      • *2: for RHD

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Table 1. for LHD

      Tester Connection

      Condition

      Specified Condition

      G85-14 (MPX1) - Q5-1 (MPX)

      Always

      Below 1 Ω

      G85-14 (MPX1) - Body ground

      Always

      10 kΩ or higher
      Table 2. for RHD

      Tester Connection

      Condition

      Specified Condition

      G85-14 (MPX1) - Q10-1 (MPX)

      Always

      Below 1 Ω

      G85-14 (MPX1) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - BATTERY AND BODY GROUND)

    1. E270596C01

      *A

      for LHD

      *B

      for RHD

      *a

      Front view of wire harness connector

      (to Rain Sensor)

      Disconnect the rain sensor connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Table 3. for LHD

      Tester Connection

      Condition

      Specified Condition

      Q5-2 (ES) - Body ground

      Always

      Below 1 Ω
      Table 4. for RHD

      Tester Connection

      Condition

      Specified Condition

      O10-2 (ES) - Body ground

      Always

      Below 1 Ω

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Table 5. for LHD

      Tester Connection

      Switch Condition

      Specified Condition

      Q5-4 (SIG) - Body ground

      Ignition switch ON

      11 to 14 V

      Ignition switch off

      Below 1 V
      Table 6. for RHD

      Tester Connection

      Switch Condition

      Specified Condition

      Q10-4 (SIG) - Body ground

      Ignition switch ON

      11 to 14 V

      Ignition switch off

      Below 1 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK RAIN SENSOR

    1. E257042C03

      *A

      for LHD

      *B

      for RHD

      *a

      Component with harness connected

      (Rain Sensor)

      Remove the rain sensor with the connector(s) still connected.

    2. Connect an oscilloscope to terminals 1 (MPX) and 2 (ES) of the rain sensor connector.

    3. Check the waveform of the rain sensor using the oscilloscope.

      OK

      Table 7. for LHD

      Tester Connection

      Switch Condition

      Specified Condition

      O5-1 (MPX) - O5-2 (ES)

      Ignition switch ON

      Pulse generation
      Table 8. for RHD

      Tester Connection

      Switch Condition

      Specified Condition

      O10-1 (MPX) - O10-2 (ES)

      Ignition switch ON

      Pulse generation

      Result

      Proceed to

      OK

      NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPLACE RAIN SENSOR

    Click here